Add nullify job for orphan runner_id columns of ci_builds

See merge request gitlab-org/gitlab!81410

When a runner gets deleted, jobs that were run with it still have
runner_id. With this commit, old data will be nullified.

There will be 3 steps;
1. Add a NOT VALID foreign key constraint to the column to ensure
GitLab doesn't create inconsistent records.
2. Add a data migration, to fix or clean up existing records.
3. Validate the whole table by making the foreign key VALID.

This is the 2nd step.

Changelog: other

Document how to reduce consumption of CI/CD minutes

See merge request gitlab-org/gitlab!80923

Explain benefits and how to do that.

Implement API endpoint to get single SSH key for specific user.

See merge request gitlab-org/gitlab!81790

The main driver for this is to implement a proper and easy to maintain
resource in the [GitLab terraform
provider](https://github.com/gitlabhq/terraform-provider-gitlab).

Changelog: added

Update doc/development/adding_database_indexes.md

See merge request gitlab-org/gitlab!82079

Refactor: let reCAPTCHA error messages use translation

See merge request gitlab-org/gitlab!81977

Rerun ConvertStringifiedRawMetadataHashToJson migration

See merge request gitlab-org/gitlab!80768

Changelog: other

Add troubleshooting for private Gitpod ports

See merge request gitlab-org/gitlab!82018

Add migration to prevent trace expiration on .com

See merge request gitlab-org/gitlab!79547

Adding a temporary index for querying job trace records with seven
specific timestamps that we need to update a column for on gitlab.com

Refactor cycle analytics summary base classes

See merge request gitlab-org/gitlab!81533

Refactor to avoid multiple identical definitions of `links`, `identifier`,
`title` and `value`.

Document approval and unapproval webhook MR events

See merge request gitlab-org/gitlab!81922

Link to Support Scope of Support doc

See merge request gitlab-org/gitlab!81581

Cleanup create_project_namespace_on_project_create FF

See merge request gitlab-org/gitlab!81906

Documentation chages for permanent link to latest release

See merge request gitlab-org/gitlab!81913

Removed extra feature flag warning

See merge request gitlab-org/gitlab!82051

Removed extra feature flag warning

See merge request gitlab-org/gitlab!82048

Refactor tokens app to use GlModal confirmation

See merge request gitlab-org/gitlab!81514

Extract mergeable_discussions_state? to mergeability checks framework

See merge request gitlab-org/gitlab!81230

Fix the month view on CI usage by minutes bar chart

See merge request gitlab-org/gitlab!81185

Fix markdown serialization in content editor

See merge request gitlab-org/gitlab!81849

Removed extra feature flag warning

See merge request gitlab-org/gitlab!82046

Document enablement of personal_project_owner_with_owner_access on .com

See merge request gitlab-org/gitlab!82010

Ignore reusable group scheduled for deletion

See merge request gitlab-org/gitlab!81485

Add Integration.encrypted_properties

See merge request gitlab-org/gitlab!80219

Area(utils) add: check_allowed_absolute_path_and_path_traversal

See merge request gitlab-org/gitlab!81321

Surface validation errors as warnings

See merge request gitlab-org/gitlab!80930

This changes the behavior of VALIDATE_SCHEMA flag so that it is
reponsible only for **enforcement** of the schema validation.

Changelog: changed
EE: true

E2E: Project member migration spec

See merge request gitlab-org/gitlab!81935

Fixup quotes

Merge branch '344185-replace-data-confirm-modals-with-glmodal-in-app-views-profiles-two_factor_auths-show-html' into 'master'

Replace `data-confirm` modals with `GlModal` in `app/views/profiles/two_factor_auths/show.html.haml`

See merge request gitlab-org/gitlab!81868